Except for the "relief" postman we recently had while our usual postie, Dave the Rocker, was on holiday. I saw him come to our house, but discovered that he'd put a neighbour's mail through our door, so I picked it up and tracked him down and asked him for our mail in exchange. "Oh, I haven't got as far as your house yet" he told me. I looked at him with disbelief and he was honestly puzzled as to why. I asked him "If you haven't got to my house yet, then how can you have just put these through my letter box?", hoping that he would now realise the impossibility of his statement. Nope. He just didn't get it. I tried to spell it out for him, but I was so unconvinced that he'd actually grasped that he MUST have been at my house, or he couldn't possibly have put a neighbour's post through MY letter box, that I insisted on delivering the incorrectly delivered mail for him.